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Amorphous carbon composite carbon nitride photocatalysis material and preparation method thereof

An amorphous carbon and catalytic material technology, applied in the field of photocatalysis, can solve the problems of unfavorable large-scale production application, high price, complicated composite process of carbon material and carbon nitride, etc., and achieves excellent reusability, low cost, The effect of improving the photocatalytic performance

Active Publication Date: 2016-05-04
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These raw materials are expensive, and the composite process of carbon materials and carbon nitride is relatively complicated, which is not conducive to large-scale production and application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Add 15g of melamine to 20mL of 3mg / mL glucose aqueous solution, mix the two evenly, and place them in an oven at 90°C to completely evaporate the water. Put the mixture into a high-temperature furnace, heat it to 520°C, keep it warm for 4 hours, and let it cool down to room temperature naturally to obtain an amorphous carbon composite carbon nitride photocatalytic material.

[0021] The absorption spectrum test was carried out on the obtained photocatalytic material, and it was found that the material has a certain degree of absorption to light with a wavelength below 560nm. The prepared photocatalytic material was used to degrade 100mL rhodamine B aqueous solution with a concentration of 12mg / L. 0.1 g of composite photocatalytic material was placed in rhodamine B aqueous solution under the condition of opacity, and the adsorption-desorption equilibrium was reached after 2 hours. A 280W xenon lamp (λ≥420nm) equipped with a filter was used as the photocatalytic reaction...

Embodiment 2

[0023] Add 15g of dicyandiamide to 20mL of glycerin ethanol solution with a concentration of 25mg / mL, mix the two evenly, and let the ethanol evaporate completely by air drying. Put the mixture into a high-temperature furnace, heat it to 580°C, keep it warm for 3.5 hours, and let it cool down to room temperature naturally to obtain an amorphous carbon composite carbon nitride photocatalytic material.

[0024] The absorption spectrum test of the obtained photocatalytic material shows that the material has a certain degree of absorption for light with a wavelength below 700nm. The prepared photocatalytic material was used to degrade 100mL rhodamine B aqueous solution with a concentration of 12mg / L. 0.1 g of composite photocatalytic material was placed in rhodamine B aqueous solution under the condition of opacity, and the adsorption-desorption equilibrium was reached after 2 hours. A 280W xenon lamp (λ≥420nm) equipped with a filter was used as the photocatalytic reaction light ...

Embodiment 3

[0026] Add 15g of urea to 20mL of an aqueous solution of sucrose with a concentration of 10mg / mL, mix the two evenly, and place them in an oven at 60°C to completely evaporate the water. The mixture was put into a high-temperature furnace, heated to 500° C., kept for 5 hours, and allowed to cool naturally to room temperature to obtain an amorphous carbon-composite carbon nitride photocatalytic material.

[0027] The absorption spectrum test of the obtained photocatalytic material shows that the material has a certain degree of absorption for light with a wavelength below 600nm. The prepared photocatalytic material was used to degrade 100mL rhodamine B aqueous solution with a concentration of 12mg / L. 0.1 g of composite photocatalytic material was placed in rhodamine B aqueous solution under the condition of opacity, and the adsorption-desorption equilibrium was reached after 2 hours. A 280W xenon lamp (λ≥420nm) equipped with a filter was used as the photocatalytic reaction lig...

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Abstract

The invention relates to an amorphous carbon composite carbon nitride photocatalysis material and a preparation method thereof. The invention is characterized in that the material comprises the following components in percentages by weight: 0.3-0.4% of polyhydric organic compounds and 96-99.7% of amino compounds. Polyhydric organic compounds are used as carbon sources, amino compounds are used as raw materials for synthesizing carbon nitride, and a thermopolymerization method is used for preparing the amorphous carbon composite carbon nitride. Polyhydric organic compounds are carbonized into amorphous carbon at high temperature and the amorphous carbon is loaded on the surface of carbon nitride, so that absorption of visible light by carbon nitride is effectively promoted, and photocatalysis performance is improved. The preparation method has the advantages of simple operation, low cost, and good repeatability, and the method is suitable for large scale industrial production.

Description

technical field [0001] The invention relates to the technical field of photocatalysis, in particular to an amorphous carbon composite carbon nitride photocatalytic material and a preparation method thereof. Background technique [0002] The rapid development of industrial society makes people face increasingly severe environmental pollution and energy crisis. In order to solve these two problems, it is urgent to develop a new technology to control environmental pollution and produce clean energy. Among the many options, photocatalytic technology is the simplest and most promising. Photocatalytic materials can generate photogenerated electron-hole pairs under the excitation of a certain energy of light, and the carriers migrate to the surface of the material to undergo redox reactions with surface adsorbed substances. Taking advantage of this characteristic, photocatalytic materials can be used in the fields of degradation of organic pollutants, photolysis of water and hydr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J21/18
CPCB01J21/18B01J27/24
Inventor 寇佳慧陆春华孙卫华许仲梓熊吉如袁慧雯
Owner NANJING UNIV OF TECH
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